Is this posted in the right area? Thought it'd be better in the XJ forum...but id ask all about the lift, ask about the gearing, check all of 4wd gears (like said above), check the frame for cracks (my tj has a crack in the frame, didn't know when I got it), check the steering, check for leaks, and try to verify the AC works as well as heat. That's from my experience from my 2 XJs and my TJ. Good luck man, I hope it pans out for you.